Ludlum Model 43-65 50 cm2 Alpha Scintillator (square)

RADIATION DETECTOR: ZnS(Ag) scintillator

WINDOW: typically 0.8 mg/cm² aluminized mylar (1.2 mg/cm² recommended for outdoor use)

WINDOW AREA: 63 cm² active; 50 cm² open

EFFICIENCY: 17% - ²³⁹Pu, 17% - ²³⁰Th

BACKGROUND: ≤ 3 cpm

NON-UNIFORMITY: < 10%

COMPATIBLE INSTRUMENTS: general purpose survey meters, ratemeters and scalers

OPERATING VOLTAGE: typically 500-1200 volts

PHOTOMULTIPLIER TUBE: 1.5 in. (3.8 cm) diameter
CONNECTOR: series "C"

EFFICIENCY (4π): 17% - ²³⁹Pu; 17% - ²³⁰Th

SIZE: 4 x 4 x 9.8 in. (10.2 x 10.2 x 24.8 cm) (H x W x L)

WEIGHT: 1.2 lb (0.6 kg)